2023_JN_PP_JI WEI.pdf
Terbatas  Irwan Sofiyan
» Gedung UPT Perpustakaan
Terbatas  Irwan Sofiyan
» Gedung UPT Perpustakaan
In order to reasonably analyze the influence of shear deformation of corrugated steel web on the natural vibration frequency
of PC continuous box girder bridge with corrugated steel webs , first, the element stiffness matrix of PC box girder bridge
with corrugated steel webs is derived by using the energy variation principle. Second , according to the derived element stiffness
matrix , the solution program for calculating thenatural frequency of multi-span uniform cross-section PC continuous box girder
bridge with corrugated steel webs considering the influence of steel web shearing effect is compiled by MATLAB software. The
correctness of the natural vibration frequencies calculated by the MATLA B software is verified by the measured frequency of the
constructed bridge and the calculated value by ANSYS 3 D FE method. Finally , the influence parameters of the bending vibration
frequency of the abovementioned bridge are analyzed. The result shows that ( 1) The natural frequencies calculated by the proposed
program are in good agreement with the measured and FE values of the built bridges. The calculation program has higher
precision , the difference of the first 5-order natural frequencies is within 6. 01 % and 7 . 32 % . ( 2) The shear defomation effect of
corrugated steel webs has great influence on the natural frequency of the subject bridge, while the modification of the shear modulus
of corrugated steel webs and the type of corrugated steel webs has little influence on the bending vibration frequency of the
bridge , the difference of the first 5-order bending vibration frequencies is within 1. 07% and 0. 55%, which can be ignored.
( 3) The dynamic analysis of the subject bridge considering the shear deformation effect can be easily incorporated into the matrix
displacement system of the common framed structure, which avoids the complexity of the establishment and solution of the
ANS YS FE model , It provides a reference for the calculation and analysis of the bending vibration frequency of the bridge type.